CN1902462A - Ballistic-resistant article - Google Patents

Ballistic-resistant article Download PDF

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Publication number
CN1902462A
CN1902462A CNA2004800397025A CN200480039702A CN1902462A CN 1902462 A CN1902462 A CN 1902462A CN A2004800397025 A CNA2004800397025 A CN A2004800397025A CN 200480039702 A CN200480039702 A CN 200480039702A CN 1902462 A CN1902462 A CN 1902462A
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CN
China
Prior art keywords
layer
preformed board
individual layer
fiber
ballistic
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Granted
Application number
CNA2004800397025A
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Chinese (zh)
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CN1902462B (en
Inventor
马丁努·约翰内斯·尼古拉斯·雅各布斯
瑞那得·乔则夫·玛丽亚·斯特曼
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DSM IP Assets BV
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DSM IP Assets BV
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/02—Layered products comprising a layer of synthetic resin in the form of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/04—Plate construction composed of more than one layer
    • F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
    • F41H5/0478—Fibre- or fabric-reinforced layers in combination with plastics layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • B32B2307/518—Oriented bi-axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing

Abstract

The invention relates to a preformed sheet comprising at least two mono-layers, each mono-layer containing unidirectionally oriented fibers having a tensile strength of at least about 1.2 gpa and a tensile modulus of at least 40 gpa, and a binder, with a fibre direction in each mono-layer being rotated with respect to the fibre direction in an adjacent mono-layer, and a separating film on both outer surfaces, characterized in that the separating film has a porosity of between 40 and 90 %. With this preformed sheet assemblies and articles offering a substantially higher ballistic protection level at a certain weight can be obtained. The invention further relates to an assembly of at least two such sheets and to a flexible ballistic-resistant article comprising said assembly.

Description

Ballistic-resistant article
The present invention relates to a kind of preformed board, a kind of assembly of at least two plates and the flexible ballistic-resistant goods that comprise described assembly.Preformed board comprises two-layer at least individual layer and the barrier film on two outer surfaces, every layer of individual layer comprises having at least about 1.2Gpa tensile strength and the unidirectional orientation fiber and the adhesive of 40Gpa stretch modulus at least, and the machine direction on every layer of individual layer is rotated with respect to the machine direction on adjacent monolayer.
By the known this preformed board of EP 0907504 A1.EP 0907504 A1 has described a kind of composite layered plate (or preformed board), and this composite layered plate prepares by following steps: 4 layers of individual layer are intersected pile up and adopts the barrier film for preparing by low density polyethylene (LDPE), and under high-temperature pressurizing that this stacking material is fixed subsequently.The individual layer that comprises the unidirectional orientation fiber is prepared by following steps by the aramid fiber with 1680dtex fiber number (aramid) yarn fibers: the aramid yarn line fiber is directed on comb by tubular style spinning machine (bobbin frame), and come wetting as adhesive or host material its aqueous liquid dispersion with polystyrene-poly isoprene-polystyrene block copolymer.The flexible ballistic-resistant moulded products is made by the described composite layered plate of disconnected multi-disc of piling up, and described stacking material is stable by sewing up in corner connection place.
Shortcoming by the known preformed board of prior art is, comprises that the energy absorption (this energy absorption is used to weigh bulletproof ability) of the ballistic-resistant article of described plate and the ratio between the ballistic-resistant article weight are undesirable.This ratio uses specific energy absorption (SEA) to represent usually, just the energy that absorbed of mass area ratio (being commonly called surface density (AD)).This means in order to reach certain desirable protective capacities, need the ballistic-resistant article of phase counterweight.On the other hand, if ballistic-resistant article weight is lighter, then to impact ability relatively low for the anti-bullet of these goods.For many application scenarios, the alap weight of ballistic-resistant article that engages with a certain minimum protective capacities is very important.This ballistic-resistant article for example is used among the P.P, and the armor (for example bullet-proof vest) for example for example also is used in the vehicle.
Therefore, in industry the preformed board that can prepare ballistic-resistant article is had lasting demand, this ballistic-resistant article under a certain weight provides higher protective capacities.
The invention provides a kind of preformed board, wherein, barrier film has the porosity between 40% and 90%.
Employing is according to preformed board of the present invention, under a certain weight according to board component of the present invention or comprise that the ballistic-resistant article of the board component according to the present invention can reach higher in fact protective capacities.Another advantage according to preformed board of the present invention is to have the desirable ratio between protective capacities and surface density, comprise that the ballistic-resistant article of preformed board assembly is more soft, and this has increased the range of application of this ballistic-resistant article.This makes these goods be specially adapted to wish the application (for example, being used in the armor) of flexibility and comfort.This plate also has the printability (impressionability) of improvement to different technology, this production to fabric, quality control and trackability are advantages.
Ballistic-resistant article means the parts of moulding, and these goods comprise at least two assemblies according to preformed board of the present invention, and they can or be used for the armor of vehicle as vest for example, and they provide protection to avoid being subjected to for example impact of bullet and shell sheet.
Assembly according to the present invention comprises the unconnected each other preformed board of a pile, that is to say that the major part of the adjacently situated surfaces of these plates is not attached to or is bonded together.Yet the unconnected each other preformed board of a pile is reluctant, because lack the further required any adhesion of processing between this stacking material.Stick together in order to obtain some, for example ballistic-resistant article can stitch together.Yet this stitching should be lacked as much as possible, for example only in corner connection place or around the edge, so that can relatively move between the plate.Another kind may be that the preformed board of will pile up is enclosed in soft big envelope or the parcel.Therefore, remain on assembly or the preformed board in ballistic-resistant article can move each other, thereby assembly or goods itself has tackness and has good flexibility.
Preformed board comprises the unidirectional orientation fiber of two-layer at least individual layer, and the machine direction on every layer of individual layer is rotated with respect to the machine direction on adjacent monolayer, and two-layer at least individual layer is connected to together or sticks together.The angle of rotation is 0-90 ° (meaning the minimum angles between the fiber of adjacent monolayer).More preferably, angle is 45-90 °.Most preferably, angle is 80-90 °.The ballistic-resistant article that is such angle between the fiber on the adjacent monolayer has better shellproof characteristic.Term mono-layer refers to the layer of unidirectional orientation fiber and adhesive, and this adhesive sticks together fiber basically.
The term fiber not only comprises slender silk, also comprises multifilament yarn or dull and stereotyped band.Term unidirectional orientation fiber refers to the fiber of substantially parallel orientation in one plane.
Fiber in preformed board of the present invention has the tensile strength of 1.2Gpa at least and the stretch modulus of 40Gpa at least.Fiber can be inorfil or organic fiber.Suitable inorfil for example is, glass fibre, carbon fiber and ceramic fibre.The suitable organic fiber with high-tensile is the fiber of polyolefine fiber, vinal and the polyacrylonitrile of aramid fiber, liquid crystal polymer fibre and the high orientation that for example obtains by for example gel spinning technology for example.These fibers preferably have at least about 2Gpa, and at least 2.5 or even the tensile strength of 3Gpa at least.The preferred polyolefine fiber that uses high orientation.The advantage of this fiber is that they have high-tensile and have low-gravity, and they are particularly suitable for being used in the lightweight bulletproof goods as a result.
Suitable polyolefin specifically is the homopolymers and the copolymer of ethene and propylene, they can also comprise a spot of one or more plant other polymer, concrete is other alkene-1 polymer.
If linear polyethylene (PE) is selected as polyolefin, obtain good result so.Linear polyethylene is understood that to mean herein has per 100 C atoms less than 1 side chain, and preferred per 300 C atoms are less than the polyethylene (side chain or branch comprise at least 10 C atoms usually) of 1 side chain.Linear polyethylene also comprise at the most one or more kinds of 5mol% can with other alkene of its copolymerization, for example, propylene, butylene, amylene, 4-methylpentene, octene.
Preferably, linear polyethylene has high molecular weight, and inherent viscosity (IV under 135 ℃, measures in the solution of naphthalane) is 4dl/g at least, is more preferably 8dl/g at least.This polyethylene is also referred to as uhmwpe (UHPE).Inherent viscosity is used to weigh molal weight (being also referred to as molecular weight), its ratio such as M nAnd M wActual molar mass parameters easilier determine.IV and M wBetween have some empirical relations, but these relations highly depend on molar mass distribution.Based on equation M w=5.37 * 10 4[IV] 1.37(seeing EP 0504954 A1), 4 or the IV of 8dl/g be equivalent to about 360 or the M of 930kg/mol respectively w
Preferred high-performance polyethylene (HPPE) fiber of being made up of polyethylene filaments that uses, these polyethylene filaments prepare by for example gel spinning technology described in GB 2042414 A or the WO 01/73173.Gel spinning technology is made up of following steps basically: preparation has the solution of the linear polyethylene of high inherent viscosity, this solution is spun filament being higher than under the temperature of solution temperature, this filament is cooled to following the making of gelling temp produces gel, and remove desolvate before, during or with the after-drawing filament.
The term adhesive refers to that a kind of fiber that makes is bonded together, and can all or part ofly seal the material that fiber makes in processing and keeps single layer structure during preparing preformed board.Adhesive can use with various forms and mode, for example, as film, (for example, adopt molten polymer or solution or the dispersion liquid of polymeric material in liquid) as horizontal adhesive tape with as transverse fiber (horizontal) or by fiber is embedded in the host material with the host material dipping and/or with fiber with respect to unidirectional fibre.Preferably, host material is evenly distributed on the whole surface of individual layer, yet adhesive tape or binder fibre also can locally use.EP 0191306 B1, EP 1170925 A1, EP 0683374 B1 and EP1144740 A1 have described suitable adhesive.
In preferred embodiments, adhesive is a polymer matrix material, and it can be thermosets or thermoplastic or the mixture of the two.The elongation at break of host material is preferably greater than the elongation of fiber rate.Adhesive preferably has the percentage elongation of 3-500%.For example WO 91/12136 A1 (15-21 page or leaf) has enumerated suitable thermosetting and thermoplastic matrix material.From thermosetting polymer, preferably select vinyl esters, unsaturated polyester (UP), epoxy resin or phenolic resin as host material.From thermoplastic polymer, polyurethane, ethene polymers, polyacrylic acid, polyolefin or thermoplastic elastomer block copolymer (for example, polyisoprene-polyethylene-butylene-polystyrene or polystyrene-poly isoprene-polystyrene block copolymer) can be selected as host material.Preferably, adhesive is made up of thermoplastic elastomer (TPE) basically, preferably, these adhesives is coated to basically on the every filament of fiber described in the individual layer, this adhesive has the stretch modulus (under 25 ℃, measuring according to ASTM D638) that is lower than about 40MPa.This adhesive makes the flexibility of individual layer and preformed board assembly very high.Find,, then obtain extraordinary result if the adhesive in individual layer and the preformed board is a SIS.
In a specific embodiments of the present invention, except polymeric matrices, also comprise filler according to the adhesive in the preformed board of the present invention, this amount of filler is that basic calculation is 5-80 volume % with the adhesive cumulative volume.More preferably, amount of filler is 10-80 volume %, most preferably, is 20-80 volume %.Find that the flexibility of such ballistic-resistant article increases and shellproof characteristic is not had tangible negative effect.
Filler is inoperative to the cohesive between the fiber, but it the matrix between the fiber played volume fill, ballistic-resistant article is more soft and have a higher energy absorption as a result.Filler preferably includes the material of the fine dispersion with low weight or density.Filler can be a gas, although there is application problem as filler in using gases in host material processing.Filler can also comprise the material that is used to disperse, for example the powder of emulsifying agent, stabilizing agent, adhesive etc. or fine dispersion.
Find, comprise the filler that is lower than 80 volume % if having the adhesive of the host material of constant total amount, the adhesive of this consumption is enough to the bonding force that reaches suitable between fiber so.Also find, be higher than the filler of 5 volume % if matrix comprises consumption, the flexibility of ballistic-resistant article increases so.
Preferably, the amount of adhesive is at most 30 quality % in individual layer, more preferably, be at most 25,20 or even be at most 15 quality % because fiber has been contributed most of ballistic performance.
Preformed board of the present invention is included in the barrier film that has the 40-90% porosity on two outer surfaces.Described film can be for example porous polyethylene membrane, polypropylene screen or poly tetrafluoroethylene, has described their preparation method among EP0184392 A1 and EP 0504954 A1.Porosity in the film is the relative volume (representing with percentage by volume) of space in the film, hole or passage, and this relative volume is determined by density measure.Before the film with crack with holes is used in the preformed board, can measure the porosity of film very expediently, porosity can also reduce film during forming preformed board in the pressure laminated.During lamination or extruding, select such condition (temperature, pressure, time) to obtain consolidation board, just, make being bonded to together to small part of all laminates, but do not make the barrier film fusion basically, because this may damage the porosity and the mechanical performance of film.
Preferably, barrier film has at least 50% or even at least 70% initial porosity (porosity before the preparation preformed board).
Preferably, this film is so-called microporous membrane, means, and hole in continuous basically basal body structure and passage have the size of 0.001-10 micron, preferably, has the size of 0.01-5 micron.
Barrier film is preferably by polyolefin prepared, more preferably, and by polyethene preparation.Exist many different brackets to be highly suitable for film forming polyethylene, they comprise dissimilar ethene and at least a copolymer of monomer (for example, alpha-olefin) altogether.In preferred embodiments, barrier film by the polyethene preparation of high molecular weight, more preferably, is at least uhmwpe (UHPE) preparation of 4dl/g basically by IV.This film has high relatively intensity and modulus usually, and high abrasion resistance.
Preformed board can also be included in adhesive layer between perforated membrane and other laminate with the cohesive of improving interlayer and therefore improve the robustness and the stability of plate.
In a specific embodiments of the present invention, preformed board comprises individual layer (comprising the HPPE fiber) and polyethylene porous membrane, more preferably, comprises micropore UHPE film.The advantage of this structure is, the bonding force between each laminate is fine and do not need other adhesive, and this reduces weight.And, comprising that the flexibility of assembly of this plate of a pile is very high, this may be because the friction between the plate surface is very low.This has obviously improved the dress comfortableness of the protective article of preparation thus.
Preferably, barrier film is a biaxially oriented film, more preferably, is 10-100 * biaxially oriented film.10-100 * biaxially oriented film is understood that a kind of film herein, and this film surface that makes this film that is stretched on two vertical directions increases by 10 to 100 times.The method that is used to prepare described oriented film has been described among the EP 0504954.The advantage of biaxially oriented film is, can obtain under a certain weight even higher protective capacities.Preferably, this film be at least 20 * biaxial tension, at least 30 * or even at least 40 *.More preferably, the biaxially oriented film by the UHPE preparation is used in the plate.This film has high relatively tensile strength and modulus, and it works to the blastic deformation of preformed board.For better with non-hole material contrast, tensile property preferably represents in thin-film width (with N/m), but not with cross-sectional area (as N/m 2) represent.Therefore, preferably, barrier film has at least 150N/m, at least 200 or even the tensile strength of the flat thin film width of 250N/m (being also referred to as intensity factor herein) at least.Have (for example) under the situation of high elongation at tear greater than 20%, yield strength preferably as with reference to but not fracture strength.The stretch modulus of flat thin film width is 3000N/m, 4000N/m or even 5000N/m at least at least at least preferably.
Although the quality of the thickness of film or per surface area (being called as face quality and surface density) is inessential to ballistic performance, preferably very thin film is because this helps preparing lightweight and soft plate, assembly and goods.Barrier film in the preformed board has 2-8, preferably, has 2-4g/m 2Surface density the time obtain best result.
Preformed board according to the present invention comprises two-layer at least individual layer, and this individual layer comprises the unidirectional orientation fiber.Usually, preformed board comprises the individual layer of 2 layers, 4 layers or other multiple layer vertical orientation of 2.Preferably, preformed board comprises the two-layer individual layer of the unidirectional orientation fiber that makes up with biaxially oriented film.The preformed board that have biaxially oriented film on two outer surfaces, has an individual layer of two layers of unidirectional directional fiber simultaneously has optimum bullet-proof.
In a specific embodiments of the present invention, preformed board comprises monodirectional tension film as barrier film, and preferably, this film has the draw ratio of 10-50.The position that these monodirectional tension films are placed makes the draw direction of this film vertical with the machine direction of unidirectional fibre in adjacent layer.In this case, plate can comprise the odd number individual layer.In one embodiment, 3 layers of individual layer of unidirectional orientation fiber (central core of these three layers of individual layers can have the highest with the identical surface density of two adjacent individual layers) are covered by monodirectional tension film, and the draw direction of this film is vertical with the machine direction of the unidirectional fibre in adjacent layer.The advantage of this structure is that by monodirectional tension film calendering (calander) is prepared in the continuous processing of plate, two-layer barrier film can be used with equidirectional by the slave plate roller for example to a pile individual layer.
The invention still further relates to the assembly of the two-layer at least preformed board of a kind of the present invention of comprising, these plates do not interconnect.Along with the increase of preformed board quantity, bulletproof ability has improved, but the weight of assembly increases and flexibility reduces.In order to reach maximum flexibility, do not connect between the adjacent panels in the assembly.According to threaten degree and required protective capacities, those skilled in the art can find optimum plate number by some experiments.
Find in application according to ballistic-resistant assemble of the present invention or comprise other advantages of the goods of this assembly that wherein, except the weight and protective capacities of ballistic-resistant article, flexibility plays an important role.
Ballistic-resistant assemble and goods can be used in the permanent and disposable flexible application.Permanent flexible application refers to following application, and wherein, owing to use continuously, the shape of ballistic-resistant article is adjusted, and for example, is used for the ballistic-resistant article of the armor.Disposable flexible application refers to following application, and wherein, ballistic-resistant assemble or goods are made concrete shape by disposable.Example is the ballistic-resistant article that is installed in the unapproachable space (for example, the inside of car door).
Find,, can reach flexibility, protective capacities and the weight of suitable ballistic-resistant article so if the weight of preformed board has specific maximum.Preferably, in permanent flexible application, the weight and the surface density of the preformed board in the ballistic-resistant article are at most 500g/m 2, the fiber content of every layer of individual layer is 10-150g/m 2More preferably, the weight of preformed board is at most 300g/m 2, the fiber content of every layer of individual layer is 10-100g/m 2
Disposable flexible application can be utilized to comprise has 800g/m at the most 2, be preferably greater than 300g/m 2Weight or the ballistic-resistant assemble or the goods of surface density preformed board because in disposable flexible application, wish that certain minimum hardness is to keep applied shape.More preferably, the weight of preformed board is greater than 400g/m 2, also will be more preferably, greater than 500g/m 2
In principle, ballistic-resistant assemble can be made by any known proper method, for example, and according to the method for in WO 95/00318, US 4623574 or US 5175040, describing.Individual layer is for example by preparing their parallel orientations in a plane as a result with fiber by tubular style spinning machine orientation on comb.Interim gripper shoe (for example coating cardboard of removing from individual layer again in the technology after-stage) can be used for simplifying processing.Adhesive is mainly used in fiber is sticked together, to remain on fiber orientation and the structure that obtains during other procedure of processing.If host material is as adhesive, then planar before the parallel orientation or after, fiber preferably adopts a certain amount of liquid coating that comprises adhesive or presoma, and the reaction in the after-stage of making ballistic-resistant article of this presoma generates has the polymer matrix material of wishing elastic modelling quantity.The term presoma refers to monomer, oligomer or crosslinkable polymeric composition.Liquid can be solution, dispersion liquid or fused mass.
A large amount of individual layers preferably, with about 90 ° angle, are placed on the top of another layer with certain anglec of rotation, and barrier film is placed on two surfaces and goes up (on pile up individual layer and below), form multi-layer sheet like this in this technology.Preferably, utilize known technology, increase temperature and/or pressure with fixed each layer, this can for example carry out by compression stack layer in mould discontinuously, or carries out continuously by lamination and calendering step.If host material as adhesive, can make this matrix flow between fiber so and be adhered to the fiber on bottom and/or upper strata, and optional being adhered on the barrier film.If adopt host material solution or dispersion liquid, so individual layer is formed multiple-plate technology and also comprise the step of solvent or dispersant volatilization (usually place separating film layer and consolidation step before).Then, pile up preformed board making assembly, then, this assembly can be used to prepare ballistic-resistant article, optionally sews up or comes stabilizing component with flexible cover encapsulation stacking thing by for example local.
Find, consider to obtain low adhesive content that especially obtain low matrix material content, it is favourable using following method, in this method, individual layer prepares with the dispersion liquid of matrix and optional filler is wetting by the yarn that will have 500-2500dtex number of threads (fiber number).It is less relatively to have the host material that the yarn of the above number of threads of 500dtex absorbs in the dispersion liquid.Preferably, number of threads is greater than 800dtex, more preferably, and greater than 1000dtex, most preferably, greater than 1200dtex.Number of threads preferably is lower than 2500dtex, because these yarns can stretch in the individual layer plane easilier.
Preferably, use the aqueous liquid dispersion of matrix.The viscosity of aqueous liquid dispersion is low, and its advantage is that matrix is evenly distributed on the fiber very much, and the result realizes well, uniform fibers-fiber is bonding.Another advantage is that dispersant water is nontoxic, therefore can be evaporated in the air.Preferably, consider that dispersion liquid comprises the solid constituent with respect to dispersion liquid total amount (filler of elastomer based material and any existence) 30-60 quality % in order to obtain low matrix percentage and evenly distribution.
The ballistic-resistant assemble of the present invention that obtains according to method described above especially has extraordinary ballistic performance and (uses V under low relatively surface density 50With the SEA value representation).Preferably, has 300Jm at least according to assembly of the present invention or the flexible ballistic-resistant goods that comprise these assemblies when impacting when being subjected to FMJ Parabellum 9 * 19mm (8 gram) type bullet 2The specific energy absorption of/kg (SEA).To the energy absorption (EA) of the impact of bullet or shell sheet by speed V 50Bullet or the kinetic energy of shell sheet calculate.V 50Be such speed, under this speed, the probability that bullet or shell sheet penetrate ballistic structure is 50%.
The present invention relates more specifically to a kind of flexible ballistic-resistant goods, these goods comprise the board component that multi-disc comprises two-layer at least individual layer and porous polyethylene barrier film, individual layer is made up of the HPPE multifilament yarn that has at least about the 1.2Gpa tensile strength basically, and described assembly has 1.5kg/m at least 2Surface density (AD) and 280Jm at least 2The specific energy absorption of/kg (SEA), this specific energy absorption is measured 9 * 19mm FMJ Parabellum bullet according to Stanag 2920 test process.Preferably, these goods have at least 300,325,350 or even 375Jm at least 2The SEA of/kg.
The present invention further explains by following examples, but is not limited thereto.
Method
● IV: inherent viscosity is according to method PTC-179 (Hercules Inc.Rev.Apr.29,1982) under 135 ℃, in the naphthalane, dissolution time is 16 hours, adopt DBPC to get off definite as the condition of antioxidant (consumption is a 2g/l solution), wherein, the viscosity that will measure under variable concentrations is extrapolated to the viscosity that obtains under the zero-dose.
● side chain: the side chain number in the UHPE sample is determined on the thick pressing mold film of 2mm by FTIR, wherein, utilizes the calibration curve of measuring based on NMR to determine at 1375cm -1The uptake (for example, EP 0269151) at place.
● tensile property: the tensile strength of multifilament yarn (or intensity), stretch modulus (or modulus) and elongation at break (or eab) are determined according to the regulation among the ASTM D885M, wherein, the name calibrated length is the fiber of 500mm, and loading velocity is 50%/min and adopts the Instron2714 anchor clamps.On the basis of the load-deformation curve of measuring, determine modulus by the slope between the 0.3-1% strain.In order to calculate modulus and intensity, divided by fiber number, this fiber number is determined by the 10 meters long fibers of weighing with measured tensile force.Assumed density is 0.97g/cm 3Calculate the GPa value.The tensile property of film is measured according to ISO 1184 (H).
● the porosity of porous membrane: porosity calculates by the density of the material of the density of film measured and preparation film that (for UHPE, density is 0.97g/cm 3).
● ballistic performance: the V of composite material face 50With SEA according to Stanag 2920 test process, utilize 9 * 19mm FMJ Parabellum bullet (from Dynamit Nobel) to measure.The flexible band of laminate assembly utilization is fixed in the support that Roma Plastilin backing material is housed, and this backing material is 35 ℃ of following preliminary treatment.Damage effect quantizes by the degree of depth of measuring backing material back face deformation.
Preparation HPPE fiber
Prepare the HPPE multifilament yarn by following steps: the naphthalane solution for preparing the UHPE homopolymers of 8 quality %, per 1000 the carbon atom side chains of this polymer are less than 0.3, IV is 19.8dl/g and the suitable/trans isomer ratio with 38/62-42/58, and this polymer solution adopts the 130mm double screw extruder that gear pump is housed to extrude with the speed of every hole 2.2g/min by the spinneret with 1176 spinneret orifices down at 180 ℃.Spinneret orifice has the initial cylindrical passage of the L/D of 3.5mm diameter and 18, then adopts 60 ° of circular cones of cone angle to be shrunk to the cylindrical channel of the L/D with 0.8mm diameter and 10.After passing the air-gap of 25mm, fluid filaments is cooled off in about 30-40 ℃ water-bath, and is about 5cm/s perpendicular to the flow velocity of the current that enter the bath filament, keeps such receipts silk speed, makes 16 draw ratio be applied in the spinning in the air-gap.Then, in two steps at solid-state down stretching filament: the first step stretches in baking oven under about 110-140 ℃ thermograde, and second step stretched down at about 151 ℃, and the total solid state drawing that is applied is than being about 25, and during this process, naphthalane evaporates from filament.The yarn that obtains thus has 930 fiber number, the tensile strength of 4.1Gpa and the modulus of 150Gpa.
Comparative example A (Comp.Exp.A)
Prepare individual layer by HPPE described above, this individual layer prepares by following steps: it is directed on comb that plurality of yarns is passed through the tubular style spinning machine, and this yarn is used as the Kraton of host material The aqueous dispersions of D1107 (polystyrene-poly isoprene-polystyrene block copolymer thermoplastic elastomer (TPE)) comes wetting.This yarn is parallel orientation onboard, and after drying, the surface density of individual layer is about 38g/m 2, matrix content is about 12 quality %.Preformed board prepares by following steps: intersection is piled up 2 layers of individual layer and is 7 microns at the both sides used thickness and (is equivalent to about 7g/m 2Surface density) non-hole linear low-density polyethylene film as separation layer, and at curing individual layer and barrier film under the pressure of about 0.5MPa and under about 110-115 ℃ the temperature.This polyethylene film has the yield strength of about 10MPa and the intensity factor of about 70N/m.
Flat ballistic-resistant article is made by loose, the disconnected assembly of a large amount of preformed board, and this assembly is sewed up in corner connection place.Ballistic performance to different assemblies adopts 9 * 19mm FMJ Parabellum type bullet (8g) test.V 50, the results are shown in Table 1 for SEA and damage (back face deformation).
Embodiment 1 (Example 1)
Repeat the comparative example A, still, the micropore UHPE film Solupor with 83% porosity of 20 micron thickness 3P07A is (from DSM Solutech, NL) as barrier film.This biaxial stretching film has the hot strength of about 12MPa, the intensity factor of 13% elongation at break (the two is all along machine direction) and about 240N/m.Slide easily between the plate of combination, therefore emphasize to stablize in further processing and test period.The flexibility that is stabilized assembly is judged as higher.This stacking material is more flexible than the stacking material of Comparative Examples A.Surprisingly, compare V with the comparative example A 50It is high that value and SEA obviously want, yet damage does not increase.
Comparative Examples B (Comp.Exp.B) and embodiment 2 (Example 2)
Repeat comparative example A and embodiment 1, but individual layer has about 39g/m 2AD, matrix content is about 15 quality %.The result confirms to adopt the ballistic performance of the plate of porous separation layer preparation to improve, and sees Table 1.
Comparative Examples C (Comp.Exp.C) and embodiment 3 (Example 3)
As the comparative example A, preparation has about 20g/m 2AD and unidirectional (UD) individual layer of the matrix content of about 15 quality %.Preformed board prepares by following steps: 4 layers of individual layer are intersected place, adopt 7g/m in both sides 2Polyethylene film, and they are fixed 110-115 ℃ of lower compression.As described above, a large amount of this plates are stacked, and adopt and sew up stable and the test ballistic performance.
In embodiment 3, preformed board comprises two-layer 8 micron thickness (surface density 3g/m 2), porosity is 63% micropore UHPE film.This film derives from DSM Solutech, NL, and with Solupor by the method described in EP0504954 A1 preparation The 3P07A film is similar.Compare with the sample that adopts non-pore membrane preparation, the ballistic performance of the assembly of making thus is obviously better, sees Table 1.
The performance of improving further illustrates by Fig. 1, and wherein, observed SEA value is with respect to the surface density mapping of the test suite of comparative example A, B and embodiment 1,2.
Table 1
Experiment Preformed board Board component
The individual layer number The plate number AD Ballistic results
V 50 SEA Damage
(kg/m 2) (m/s) (J.m 2/kg) (mm)
Comp.Exp.A 2 22 2 322 211 37
31 2,6 435 272 48
38 3,4 466 245 34
Example 1 2 24 2 417 350 44
34 2,8 464 305 40
41 3,4 506 300 35
Comp.Exp.B 2 21 2 333 201 37
29 2,6 426 263 39
36 3,4 458 245 34
Example 2 2 23 2 409 341 40
33 2,8 484 333 38
40 3,4 495 287 33
Comp.Exp.C 4 21 2 425 365 35
30 2,8 466 307 35
36 3,4 489 280 35
Example 3 4 23 2 462 429 36
32 2,8 494 352 30
39 3,4 528 329 32

Claims (11)

1. preformed board, described preformed board comprises two-layer at least individual layer and the barrier film on two outer surfaces, every layer of individual layer comprises having at least about 1.2Gpa tensile strength and the unidirectional orientation fiber and the adhesive of 40Gpa stretch modulus at least, and the machine direction on every layer of individual layer is rotated with respect to the machine direction on adjacent monolayer, it is characterized in that described barrier film has the porosity of 40-90%.
2. preformed board as claimed in claim 1, wherein said fiber comprises high-performance polyethylene fibres.
3. preformed board as claimed in claim 1 or 2, wherein, described adhesive is made up of thermoplastic elastomer (TPE) basically, and has the stretch modulus less than about 40MPa.
4. as any described preformed board among the claim 1-3, wherein, described barrier film is prepared by uhmwpe.
5. as any described preformed board among the claim 1-4, wherein, described barrier film is a biaxial stretching film.
6. as any described preformed board among the claim 1-5, wherein, described barrier film has 2-4g/m 2Surface density.
7. as any described preformed board among the claim 1-6, wherein, described barrier film has the intensity factor of 150N/m at least.
8. as any described preformed board among the claim 1-6, it comprises the two-layer individual layer of unidirectional orientation fiber.
9. at least two assemblies as any described plate among the claim 1-8, described plate does not interconnect.
10. flexible ballistic-resistant goods, described goods comprise the assembly of at least one claim 9.
11. comprise the flexible ballistic-resistant goods of assembly, described assembly comprises the multi-disc plate, described plate comprises two-layer at least individual layer and two polyethylene barrier films that have the 40-90% porosity on two outer surfaces, every layer of individual layer is made up of the unidirectional orientation high-performance polyethylene fibres that has at least about the 1.2Gpa tensile strength basically, and the machine direction on every layer of individual layer is rotated with respect to the machine direction on adjacent monolayer, and described assembly has 1.5kg/m at least 2Surface density and 300Jm at least 2The specific energy absorption of/kg, described specific energy absorption is measured 9 * 19mm FMJParabellum bullet according to Stanag 2920 test process.
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